http://www.autosport.com/news/report.php/id/73020

"When we deploy the safety car, the message will go to all the cars, which will then have a "safety car" mode on their ECUs. As soon as that message gets to the car, it'll know where it is on the circuit, and it'll calculate a minimum time for the driver to get back to the pits. The driver will have to respect this and the information will be displayed on his dashboard.


"If you remember, the reason we closed the pit entry was to remove the incentive for the driver to come back to his pit quickly. That's gone now, as you won't be able to reach the pits any quicker than your dashboard display allows you to. "
A good solution to a problem that need not have existed in the first place...